His little business venture quickly became a success. While he initially hoped it’d simply provide an income and source of employment once his fighting career is over, he’s found that it’s already having an impact.

“What I gained from it is something that I can’t put a price on,” he said. “I get motivation, inspiration from some of the women that come into my studio, and they bust their butt. We’ve had five women that have lost 27-plus pounds in the studio, and that’s incredible.

“I see these women come in at 6 a.m., go to work, take the kids home, come back, knock out two classes and be excited about it. You get a little bit emotional. Where I was 10 years ago, I would have never imagined this. But me being able to inspire people and create something so positive is such a great feeling.”

Check out the above video (from our partners at Shoot Media) as Castillo discusses his new business venture, the sting of a recent narrow loss to Edson Barboza, Saturday’s bout with Brenneman and more.